This remanufactured drum unit replaces the original Konica-Minolta 4519401 Black] drum unit and guaranteed to perform with your Konica-Minolta laser printer. Our remanufacturing facility specially engineered this drum unit to match the quality, reliability and yield of expensive OEM (Original Equipment Manufacturer) drum unit.Purchasing this remanufactured drum unit is a great way to save money. This drum unit houses the laser toner cartridge which can be bought separately with us. Using this remanufactured Konica-Minolta 4519401 drum unit will not void your printer’s warranty according to Magnuson-Moss Warranty Act of 1975. For your 100% satisfaction, we offer 3 year money back guarantee and free shipping on all orders $35+ within continental USA.